Zim

Invader Zim is the titular main protagonist of the franchise of the same name. He is an Irken serving the Irken Empire as an Invader. Because of his incompetence, Zim was banished to Earth by the Almighty Tallests under the guise of being sent to conquer it.

Although he is the main character, Zim is morally (and ethically) a villain, being overall a fairly tendentious, argumentative, confrontational and unsympathetic character, though he occasionally shows some kindness towards certain characters. Nevertheless, he is prone to causing chaos and destruction for either himself, his own race, or Earth. However, in the pilot and first episode of the show, the main antagonist was Dib.

Trivia

 * He was voiced by Richard Steven Horvitz, who also played Kaosin the Skylanders franchise, Zhencha in Disney's Mulan, and Lugosi in Bunnicula.